Across
- 2. A carbon ___________ is something that puts carbon into the atmosphere.
- 5. Humans have caused this by changing the makeup of our atmosphere.
- 7. This refers to nonliving things.
- 9. This is the data we collect using our senses.
- 11. Something we use.
- 13. This is where living things are found.
- 14. This is the layer of gases surrounding a planet.
- 16. The study of how living things interact with each other and their environments.
- 17. A carbon ____ is something that removes carbon from the atmosphere.
- 20. These are the assumptions or conclusions we make based on observations.
- 21. Something the earth provides us that we want or need.
- 22. These are services the natural world provides us for free.
Down
- 1. A type of resource that won't run out.
- 3. These are species that humans added into an ecosystem where they did not live before.
- 4. Your ecological _____________ is a measure of how many global hectares are needed to produce enough resources for your current lifestyle.
- 6. This is the earth's crust and upper mantle.
- 8. The removal of many trees.
- 10. Another term for overconsumption, this is when people use more of a resource than the earth can replenish.
- 12. A resource that is being used faster than more is being produced, meaning we will eventually run out.
- 15. This is all the water in and on our planet.
- 18. This refers to living things.
- 19. The spreading of dry, unproductive landscapes.